cloaca

The dinosaur’s cloaca appears to have a distinct color, which could have been used to signal for mates, as is sometimes the case for birds.

He had discarded his first instinct, which was to hide in the intricate Tetrahyde cloaca.

The two Oviducts do not open together into the cloaca, though, as my sections prove, their openings are very close together.

Each Wolffian duct ends blindly in front, and the two unite behind to open by a common papilla into the cloaca.

This involution grows backwards in the form of a duct and opens into the cloaca.

The lower end of the segmental duct unites with a horn of the cloaca.